Ultra-low-expansion glass-ceramic super-stable treatment method

Abstract

The invention relates to an ultra-low-expansion glass-ceramic super-stable treatment method. The invention adopts an air-sealing low conductive high temperature dependent non-metallic box (1). The method comprises the following steps that: an ultra-low-expansion glass-ceramic machining part (2) to be treated is placed in a heat treatment furnace (3), the heat treatment furnace is heated from the room temperature to a temperature ranging from 360 DEG C to 420 DEG C at a rate of 3-5 DEG C / min according to the demand, the temperature is kept for 8-12 hours, then the temperature is reduced at a rate of 0.05-0.2DEG C / min; and when the temperature of the treatment furnace is reduced to 120+ / -20 DEG C, the treatment furnace control system is closed, and the treated machining part is placed in the furnace for 48 hours and then taken out. By adopting the ultra-low-expansion glass-ceramic super-stable treatment method, the internal stress existing in the machining part and the thermal deformation of the machining part can be effectively reduced so that the angle variation is less than 1 second of arc when the temperature changes from -50 DEG C to +100 DEG C; and the linear expansion coefficient of the glass-ceramic is ensured to be superior to 0.5*10<-7> / DEG C and the stabilization efficiency is increased.

Description

technical field [0001] The invention relates to an ultra-stabilization treatment method for ultra-low expansion glass-ceramics, in particular to an ultra-stabilization treatment method for a laser gyro resonant cavity that requires high stability. Background technique [0002] Laser gyroscopes are generally made of ultra-low expansion glass-ceramics (such as ZERODUE, etc.), and are manufactured into ring resonators. The temperature stability of the resonator directly affects the stability of the laser gyroscope performance. The resonant cavity is generally realized by optical mechanical processing methods such as drilling, milling, and grinding. The machining process inevitably produces residual stress, which destroys the stability of the material and causes the workpiece to deform over time. [0003] Although the traditional temperature stabilization treatment method eliminates the internal stress of the workpiece to a large extent and stabilizes the structure, it destroy...

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Problems solved by technology

[0005] In order to solve the problem that the existing technology cannot meet the ultra-stabilization processing requirements of the laser gyro resonator, the present invention provides an ultra-low expansion glass-ceramic that can realize the stability of the resonator structure and ensure the ultra-low expansion characteristics of the resonator cavity Ultra-stabilization treatment method

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